#region Copyright Notice
// 
// 
//  
//  Copyright (c) 2009-2011 Anindya Chatterjee
//  
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//  
//      http://www.apache.org/licenses/LICENSE-2.0
//  
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
// 
// 
#endregion
using System;

namespace AbstractClass.Extensions
{
    /// <summary>
    ///   Contains extension methods for <see cref = "Predicate{T}" />
    /// </summary>
    public static class PredicateExtensions
    {
        #region | Code Taken from Mannex Library |

        /// <summary>
        ///   Ands the specified LHS with RHS predicate.
        /// </summary>
        /// <typeparam name = "T">The type of the argument of the predicates.</typeparam>
        /// <param name = "lhs">The LHS predicate.</param>
        /// <param name = "rhs">The RHS predicate.</param>
        /// <returns>Combined predicate</returns>
        public static Predicate<T> And<T>(this Predicate<T> lhs, Predicate<T> rhs)
        {
            lhs.ThrowIfNull("lhs");
            rhs.ThrowIfNull("rhs");
            return obj => lhs(obj) && rhs(obj);
        }

        /// <summary>
        ///   Ors the specified LHS with RHS predicate.
        /// </summary>
        /// <typeparam name = "T">The type of the argument of the predicates.</typeparam>
        /// <param name = "lhs">The LHS predicate.</param>
        /// <param name = "rhs">The RHS predicate.</param>
        /// <returns>Combined predicate</returns>
        public static Predicate<T> Or<T>(this Predicate<T> lhs, Predicate<T> rhs)
        {
            lhs.ThrowIfNull("lhs");
            rhs.ThrowIfNull("rhs");
            return obj => lhs(obj) || rhs(obj);
        }

        #endregion
    }
}